28288784141 has 4 divisors (see below), whose sum is σ = 28289140572. Its totient is φ = 28288427712.

The previous prime is 28288784129. The next prime is 28288784179. The reversal of 28288784141 is 14148788282.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14659155625 + 13629628516 = 121075^2 + 116746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28288784141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288781141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725 + ... + 237861.

It is an arithmetic number, because the mean of its divisors is an integer number (7072285143).

Almost surely, 2^28288784141 is an apocalyptic number.

It is an amenable number.

28288784141 is a deficient number, since it is larger than the sum of its proper divisors (356431).

28288784141 is a wasteful number, since it uses less digits than its factorization.

28288784141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356430.

The product of its digits is 1835008, while the sum is 53.

The spelling of 28288784141 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred eighty-four thousand, one hundred forty-one".